import {
   defineAsyncComponent,
   // FunctionalComponent, CSSProperties
} from 'vue';
import { Spin } from 'ant-design-vue';
import { noop } from '/@/utils/index';

// const Loading: FunctionalComponent<{ size: 'small' | 'default' | 'large' }> = (props) => {
//   const style: CSSProperties = {
//     position: 'absolute',
//     display: 'flex',
//     justifyContent: 'center',
//     alignItems: 'center',
//   };
//   return (
//     <div style={style}>
//       <Spin spinning={true} size={props.size} />
//     </div>
//   );
// };

interface Options {
   size?: 'default' | 'small' | 'large';
   delay?: number;
   timeout?: number;
   loading?: boolean;
   retry?: boolean;
}

export function createAsyncComponent(loader: Fn, options: Options = {}) {
   const { size = 'small', delay = 100, timeout = 30000, loading = false, retry = true } = options;
   return defineAsyncComponent({
      loader,
      loadingComponent: loading ? <Spin spinning={true} size={size} /> : undefined,
      // The error component will be displayed if a timeout is
      // provided and exceeded. Default: Infinity.
      // TODO
      timeout,
      // errorComponent
      // Defining if component is suspensible. Default: true.
      // suspensible: false,
      delay,
      /**
       *
       * @param {*} error Error message object
       * @param {*} retry A function that indicating whether the async component should retry when the loader promise rejects
       * @param {*} fail  End of failure
       * @param {*} attempts Maximum allowed retries number
       */
      onError: !retry
         ? noop
         : (error, retry, fail, attempts) => {
              if (error.message.match(/fetch/) && attempts <= 3) {
                 // retry on fetch errors, 3 max attempts
                 retry();
              } else {
                 // Note that retry/fail are like resolve/reject of a promise:
                 // one of them must be called for the error handling to continue.
                 fail();
              }
           },
   });
}
